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An audio-visual "package deal?"

Collection:
Agricultural Communications Documentation Center (ACDC)
Contributor:
Johnson, George F. (main author / Pennsylvania State University)
Format:
Journal article
Publication Date:
1954-12
Published:
USA: American Association of Agricultural College Editors
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois
Subject Term:
audiovisual aids, communication units, cooperation, extension communication, visual communication